1969 Malibu

[m22mike]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: earntaz</div><div class="ubbcode-body">I noticed the vac advance is connected to the baseplate and not the timed port on the metering block. Does it idle OK without a &quot;shake&quot;. I just redid a 69' 3310 which did not have a timed port -- had to get creative with the drill to establish a timed port on the RH side of front metering block. TAZ </div></div>

I actually tried it both ways, it idles and runs VG using full ported vacuum.

I went with a VC1810 (B28) can. 8* distributer/16* crank. fully deployed at 8hg. Starts coming in around 5 HG. Tried it with ported vacuum and still did not act right.It was surging some because of the weaker vacuum signal, Switched to full manifold vacuum and now it is stable @ idle and I have just shy of 18hg.
I don't think I will change a thing, idles very smooth and throttle response is great.
I posted this link just recently in another thread, it is a good read, great info on vac advance and how it should work.

Vacuum advance cans